Bookcase



FIG. 1 is a front and side perspective view of a bookcase showing my new design;

FIG. 2 is a front perspective view thereof;

FIG. 3 is a side perspective view thereof from the left of FIG. 2, the side perspective view from the right of FIG. 2 being the mirror image thereof;

FIG. 4 is a rear perspective view thereof;

FIG. 5 is a top perspective view thereof; and,

FIG. 6 is a bottom perspective view thereof. 

The ornamental design for a bookcase, as shown and described. 